US5594463A - Driving circuit for display apparatus, and method of driving display apparatus - Google Patents

Driving circuit for display apparatus, and method of driving display apparatus Download PDF

Info

Publication number
US5594463A
US5594463A US08/273,816 US27381694A US5594463A US 5594463 A US5594463 A US 5594463A US 27381694 A US27381694 A US 27381694A US 5594463 A US5594463 A US 5594463A
Authority
US
United States
Prior art keywords
signal
voltage drop
driving
voltage
display panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/273,816
Inventor
Mitsunao Sakamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Electronic Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP5-178325 priority Critical
Priority to JP5-178326 priority
Priority to JP17832593A priority patent/JP3313830B2/en
Priority to JP17832693A priority patent/JP3390214B2/en
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Assigned to PIONEER ELECTRONIC CORPORATION reassignment PIONEER ELECTRONIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAKAMOTO, MITSUNAO
Publication of US5594463A publication Critical patent/US5594463A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/06Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0267Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/027Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0272Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0275Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0223Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/041Temperature compensation
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2014Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3216Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix

Abstract

A display apparatus has a display panel, which is provided with a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL elements connected to the scanning electrodes and the signal electrodes at intersections thereof. A driving circuit for the display apparatus is provided with: a driving device for supplying a constant current driving signal to the signal electrodes in correspondence with an input signal, to drive the display panel; a detection device for detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop; and a control device for controlling voltage, which is supplied to the driving device, to have a predetermined voltage value in correspondence with the detection signal from the detection device.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a driving circuit for a display apparatus, and a method of driving the display apparatus.

2. Description of the Related Art

There is a display apparatus, in which a plurality of scanning electrodes and a plurality of signal electrodes are arranged in a matrix shape, and an EL (Electroluminescence) element is connected to one scanning electrode and one signal electrode at each intersection of the scanning electrode and the signal electrode. By supplying a constant current driving signal to a desired signal electrode with respect to one common scanning electrode, the corresponding EL element is set in a lighting condition.

In this type of display apparatus, the EL element is degraded in its ability after it is used for a long time, so that a voltage drop Vf in the forward direction becomes large, and that the characteristic of luminance versus electric current, is also degraded. In this manner, in a constant current driving method, as the EL element is degraded in its ability, the luminance of the EL element is also gradually degraded.

Therefore, countermeasures may be proposed to prevent the voltage drop Vf in the forward direction.

Firstly, in this type of display apparatus, the voltage to be supplied to the driving device of the display apparatus, may be set high in advance so as to deal with the expected increase of the voltage drop Vf in the forward direction of the EL element. However, if the voltage to be supplied to the driving device is set high in advance in this manner, the high voltage is supplied to the driving device even in an initial condition where the ability of the EL element is not degraded. As a result, the electric power consumed by the transistors in the driving device is increased, so that there arises a waste of energy consumption.

Secondly, the current supplied from the driving device for the display apparatus, may be set high in advance so as to deal with the expected increase of the voltage drop Vf in the forward direction of the EL element. However, if this current supplied from the driving device is set high in advance in this manner, the high current is supplied from the driving device even in an initial condition where the ability of the EL elements is not degraded. As a result, the electric power consumed by transistors in the driving device is increased, so that there arises a waste of energy consumption, too.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to provide a driving circuit for a display apparatus and a method of driving the display apparatus, which can obtain an appropriate lighting condition of the EL element after it is used for a long time, and, at the same time, which can save the consumption energy even in the initial condition of the usage of the EL element.

The above object of the present invention can be achieved by a first driving circuit for a display apparatus having a display panel. The display panel is provided with a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL elements connected to the scanning electrodes and the signal electrodes at intersections thereof. The first driving circuit is provided with: a driving device for supplying a constant current driving signal to the signal electrodes in correspondence with an input signal, to drive the display panel; a detection device for detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop; and a control device for controlling voltage, which is supplied to the driving device, to have a predetermined voltage value in correspondence with the detection signal from the detection device.

When the EL element is used for a long time, the ability of the EL element is gradually degraded, so that the voltage drop Vf in the forward direction of the EL element, is increased. Thus, the voltage supplied to the driving device runs short. As a result, there arises a possibility that the driving device does not function normally. Therefore, in the first driving circuit of the present invention, the voltage drop Vf of the EL element is detected by the detecting device for detecting the voltage of the signal electrode connected to the EL element from the driving device. Here, if the detected voltage drop Vf is small, the voltage to be supplied to the driving device is set low. Thus, since the voltage having the minimum limit value of the necessary voltage to function the driving device, is supplied to the driving device, the energy consumption can be reduced.

On the other hand, if the voltage drop Vf of the EL element becomes large after extended usage of the EL element, this large voltage drop Vf is detected by the detecting device. Then, the voltage supplied to the driving device is increased, so that the driving device can perform the normal constant current operation.

Consequently, an appropriate lighting condition of the EL element can be achieved after it is used for a long time, and, at the same time, the energy can be saved even in the initial condition of the usage of the EL element, according to the first driving circuit of the present invention.

The above object of the present invention can be also achieved by a second driving circuit for a display apparatus having a display panel. The display panel is provided with a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL elements connected to the scanning electrodes and the signal electrodes at intersections thereof. The second driving circuit is provided with: a driving device for supplying a constant current driving signal to the signal electrodes in correspondence with an input signal, to drive the display panel; a detection device for detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop; and a control device for controlling the constant current driving signal, which is supplied from the driving device, to have a current value which keeps a luminance of the EL element constant in correspondence with the detection signal from the detection device.

When the EL element is used for a long time, the voltage drop Vf of the EL element is increased, and, at the same time, the characteristic of luminance versus current of the EL element, is also degraded. Thus, the luminance of the EL element is decreased. Therefore, in the second driving circuit of the present invention, the voltage drop Vf of the EL element is detected by the detecting device for detecting the voltage of the signal electrode connected to the EL element from the driving device. Here, if the detected voltage drop Vf is small, the current supplied from the driving device is set low. Thus, since the current having the minimum limit value of the necessary current range to drive the EL element, is supplied from the driving device, the energy consumption can be reduced.

On the other hand, if the voltage drop Vf of the EL element becomes large and the luminance of the EL element is decreased after the long time usage of the EL element, this large voltage drop Vf is detected by the detecting device. Then, the current supplied from the driving device is increased, so that the luminance of the EL element is kept constant.

Consequently, the EL element can maintain the constant luminance until the end of its life, according to the second driving circuit of the present invention.

The above object of the present invention can be also achieved by a first method of driving the above mentioned display apparatus having the display panel. The first method includes the steps of: supplying a constant current driving signal to the signal electrodes in correspondence with an input signal, to drive the display panel by a driving device; detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop; and controlling voltage, which is supplied to the driving device, to have a predetermined voltage value in correspondence with the detection signal.

According to the first method of the present invention, an appropriate lighting condition of the EL element can be achieved after it is used for a long time, and, at the same time, the energy can be saved even in the initial condition of the usage of the EL element, in the same manner as in the first driving circuit of the present invention.

The above mentioned object of the present invention can be also achieved by a second method of driving the above mentioned display apparatus having the display panel. The second method includes the steps of: supplying a constant current driving signal to the signal electrodes in correspondence with an input signal, to drive the display panel; detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop; and controlling the constant current driving signal to have a current value which keeps a luminance of the EL element constant in correspondence with the detection signal.

According to the second method of the present invention, the EL element can maintain the constant luminance until the end of its life, in the same manner as in the second driving circuit of the present invention.

The nature, utility, and further features of this invention will be more clearly apparent from the following detailed description with respect to preferred embodiments of the invention when read in conjunction with the accompanying drawings briefly described below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a circuit diagram of a driving circuit for a display apparatus, as one embodiment of the present invention;

FIG. 2 is a block diagram of the display apparatus including the driving circuit of the present embodiment;

FIG. 3 is a circuit diagram of the display apparatus including the driving circuit of the present embodiment;

FIGS. 4A-4G are timing charts of a X driver and FIG. 4H-4L are timing charts of a Y driver in the present embodiment;

FIG. 5 is a summarized block diagram of the driving circuit for the display apparatus according to the present embodiment;

FIG. 6 is a circuit diagram of the driving circuit for the display apparatus in the present embodiment;

FIG. 7 is a flow chart of one operation of the driving circuit of the present embodiment;

FIG. 8 is a flow chart of another operation of the driving circuit of the present embodiment;

FIG. 9A is a circuit diagram of one example of a constant current driving circuit of the present embodiment, and FIG. 9B is a circuit diagram of another example of a constant current driving circuit of the present embodiment;

FIG. 10 is a circuit diagram of a driving circuit for a display apparatus, as another embodiment of the present invention;

FIG. 11 is a flow chart of one operation of the driving circuit of the present embodiment of FIG. 10; and

FIG. 12 is a flow chart of another operation of the driving circuit of the present embodiment of FIG. 10.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to the accompanying drawings, an embodiment of the present invention will be now explained.

First Embodiment

FIG. 1 shows a driving circuit for a display apparatus of simple matrix type (i.e. constant current driving type), as one embodiment of the present invention.

In FIG. 1, source voltage (+V) is supplied to EL elements 14 through constant current sources 10 and signal electrodes 12 of the driving device. The EL elements 14 are connected to a ground GND through a scanning electrode 16. Anodes of the EL elements 14 are respectively connected to the signal electrodes 12. Cathodes of the EL elements 14 to 14' are respectively connected to the scanning electrode 16. Reference numeral 12a represent a resistance of the signal electrodes 12, and 16a represents a resistance of the scanning electrode 16.

In the above explained construction of the driving circuit, when the signal electrode 12' (i.e. the signal electrode at the right edge in FIG. 1) and the scanning electrode 16, which drive the central portion of the picture plane of the display apparatus, are selected, and all of the EL elements 14, which are connected to the scanning electrode 16, are turned ON, the voltage difference between the signal electrode 12' and the scanning electrode 16 becomes the largest, among the signal electrodes 12 and 12' with respect to the selected scanning electrode 16. The reason why the voltage reference of the signal electrode 12', which drives the central portion of the picture plane, is the largest with respect to the selected scanning electrode 16, is that the length of the scanning electrode 16 from the EL element 14', which is connected to the signal electrode 12', to the ground GND is the longest i.e. the resistances 16a of the scanning electrode 16 to the GND is the largest, as compared with other signal electrodes 12.

As described above, the voltage of the signal electrode 12' is increased to the largest extent. Thus, it becomes possible to appropriately set the source voltage (+V), by detecting the voltage difference of the signal electrode 12' at a detection terminal 18, on the basis of the detected voltage. Namely, as the voltage drop Vf of the EL element 14' is increased by the long time usage of the EL element 14', the source voltage (+V) is increased on the basis of the detected voltage at the detection terminal 18, so that a constant current source 10' can perform the normal constant current operation.

In FIG. 1, the voltage of the signal electrode 12' to drive the central portion of the picture plane, is detected at the detection terminal 18. However, the detection point is not limited in the central portion of the picture plane in this manner, but the detection point can be set at any other picture element of the picture plane. In this case, the detected voltage is compensated by taking into consideration the voltage drop in the electric lines etc., and the source voltage (+V) for the constant current sources 10 is set such that the constant current sources 10 can normally function.

FIG. 2 shows a display apparatus as another embodiment of the present invention, to which the above explained driving circuit according to the present invention is installed.

In FIG. 2, the display apparatus is provided with: a display panel 30, a X driver 32, a Y driver 34, an A/D (Analog to Digital) convertor 36, a memory 38, and a controller 42.

The display panel 30 is driven by the X driver 32 and the Y driver 34. The video signal is supplied to the memory 38 through the A/D convertor 36. The data from the memory 38 is supplied to the X driver 32. The controller 42 controls the X driver 32, the Y driver 34, and the memory 38.

FIG. 3 shows a circuit diagram of the display apparatus.

In FIG. 3, the video signal is supplied to a shift register 38a as one example of the memory 38 of FIG. 2, through the A/D convertor 36. The shift register 38a includes a plurality of FFs (Flip-Flops) 44. The signals from the FFs 44 in the shift register 38a are supplied to PWM (Pulse Width Modulation) modulators 48 through FFs 46 in the X driver 32. The signals (i.e. analog signals showing the pulse widths corresponding to the luminance data) from the PWM modulators 48 are supplied to signal electrodes A0, A1, A2, . . . , while the signals from FFs 50 in the Y driver 34 are supplied to scanning electrodes K0, K1, K2, . . . , respectively. The matrix of the display panel 30 is composed of the signal electrodes A0, A1, A2, . . . and the scanning electrodes K0, K1, K2, . . . , respectively. In the display panel 30, EL elements 52 are connected to the signal electrodes A0, A1, A2, . . . and the scanning electrodes K0, K1, K2, . . . at the intersections of the electrodes A0, A1, A2, . . . and the scanning electrodes K0, K1, K2, . . . , respectively.

A timing generator 42a as one example of the controller 42 of FIG. 2, receives a horizontal synchronization signal and a vertical synchronization signal, and outputs a signal SCLK, a signal LCLK, a signal FPUL, and a signal FCLK. The signal SCLK is supplied to the A/D convertor 36 and the FFs 44 in the shift register 38a. The signal LCLK is supplied to the FFs 46 in the X driver 32. The signal FPUL and the signal FCLK are supplied to the FFs 50 in the Y driver 34.

The horizontal synchronization signals H are supplied to the PWM modulators 48 in the X driver 32.

FIGS. 4A-4G show timing charts of the X driver and FIGS. 4H-4L show timing charts of the Y driver.

In FIGS. 4A-4G, each time when the video signal is converted by the A/D convertor 36 and sampled, the A/D converted data DATA are sequentially shifted in the FFS 44 in the shift register 38, by the signal SCLK. Then, when all of the data DATA during one horizontal synchronization period, are transmitted to the FFs 44, the data in the FFs 44 are supplied to the PWM modulators 48 through the FFs 46 in the X driver 32, by the signal LCLK. The PWM modulators 48 pulse-width-modulate the received data, and output the pulses, which have the lengths corresponding to the data respectively, to the signal electrodes A0, A1, A2, . . . , respectively.

In FIG. 4H-4L, the signal FPUL is turn to a "High" level once during the vertical synchronization period, and the pulses of the signal FPUL are sequentially transferred to the scanning electrodes (lines) K0, K1, K2, K3, . . . , by the signal FCLK. When the scanning line Kn (n=0, 1, 2, 3, . . . ) is at the "High" level, the line Kn is ignited (i.e. turned to the high level). The signal FCLK outputs one pulse during one horizontal synchronization period. The signal FPUL outputs one pulse during one vertical synchronization period.

FIG. 5 shows a summarized construction of the driving circuit of the display apparatus as the present embodiment.

In FIG. 5, the driving circuit is provided with a CPU 54, which is connected to a bus 56. There are also connected to the bus 56, a ROM (Read Only Memory) 58, a RAM (Random Access Memory) 60, D/A convertors 62 and 64, input ports 66 and 68. The D/A convertor 62 and 64 output a driving voltage command and a driving current command, respectively. To the input ports 66 and 68, a scanning electrode (cathode) timing and a signal electrode (anode) timing are supplied.

A multiplexer 70 is connected to the bus 56 through an A/D convertor 72. The multiplexer 70 receives signals from S/H (Sample and Hold) circuits 74, 76 and 78. Here, the S/H circuits 74, 76 and 78 receive the signals respectively from a terminal A, a terminal B and a temperature sensor 80 which will be explained later.

Next, FIG. 6 shows a circuit construction of the driving circuit for the display apparatus of the present embodiment.

In FIG. 6, the display panel 30 is driven by the X driver 32 and the Y driver 34. The signal electrodes A0, A1, A2, . . . from the X driver 32 and the scanning electrodes K0, K1, K2, . . . , construct the matrix of the display panel 30. At the intersection portions between the signal electrodes A0, A1, A2, . . . and the scanning electrodes K0, K1, K2, . . . , the EL elements 52 are connected to those electrodes.

First, the Y driver 34 is explained.

In the Y driver 34, when the scanning electrodes K0, K1, K2, . . . are sequentially turned to the "High" level every scanning period (i.e. one horizontal synchronization period), the EL elements 52 connected to the scanning electrodes Kn (n=0, 1, 2, . . . ) which are turned to the "High" level, is turned to light. Here, how much luminance the EL element has in its lighting condition, is determined by the signal of the signal electrodes A0, A1, A2, . . . , from the X driver 32.

Next, the X driver 32 is explained.

An electric source circuit 82 is provided in the driving circuit. In the electric source circuit 82, a voltage command from the CPU 54, is supplied to one terminal of a comparator 84, through the D/A convertor 62.

By controlling the voltage command from the CPU 54, the source voltage Vd for the signal electrode (anode) from the electric source circuit 82, can be controlled.

The source voltage Vd from the electric source circuit 82, is supplied to a constant current source 88. The current command from the CPU 54 is supplied, through the D/A convertor 64 and a V/I (Voltage/current Intensity) convertor 94, to transistors 90, 91, . . . in the constant current source 88. By controlling the current command from the CPU 54, the constant current value from the constant current source 88, can be controlled.

The constant current from the constant current source 88 is supplied to the signal electrodes A0, A1, . . . , which are diverged and connected to connectors of transistors 96-0, 96-1, . . . , respectively. Bases of the transistors 96-0, 96-1, . . . are connected to PWM modulators 48-0, 48-1, . . . , respectively. For example, if the PWM modulator 48-0 is turned to the "High" level, the transistor 96-0 turns to the ON condition, so that the constant current for the signal electrode A0 is flown through the transistor 96-0. Thus, the EL element 52 connected to the signal electrode A0, is in a light out (not lighting) condition. On the other hand, if the PWM modulator 48-0 is at the "low" level, the transistor 96-0 is turn to the OFF condition. Thus, the constant current for the signal electrode A0 is supplied to the EL element 52, so that the EL element 52 is turn to the lighting condition. When the EL element 52 is lighting, the luminance of the EL element 52 is determined by the time duration required for the PWM modulator 48 to turn to the "low" level.

In order to detect the voltage drop Vf of the EL element 52, a detection terminal A is installed to the signal electrode A0, and a detection terminal B is installed to the scanning electrode K0. The detection signals from the detection terminals A and B are supplied to the CPU 54. In the CPU 54, the voltage drop Vf of the EL element 52 is obtained on the basis of the detection signals from the detection terminals A and B. Then, the CPU 54 outputs the voltage command, on the basis of the obtained voltage drop Vf. This voltage command is, as aforementioned, supplied to one terminal of the comparator 84 in the electric source circuit 82 through the D/A convertor 62. Consequently, the source voltage Vd from the electric source circuit 82, can be controlled to be an appropriate value.

The procedure for controlling the source voltage Vd, will be explained hereinbelow, with referring to a flow chart of FIG. 7.

When the procedure starts (step S100), the driving current value is set (step S102). Namely, the luminance is set. Then, the EL element, which voltage drop is to be detected, is selected, and it is checked whether the scanning electrode (cathode) becomes active or not (step S104). When the scanning electrode (cathode) becomes active in the step S104 (YES), the flow branches to a step S106. In the step S106, the EL element to be measured is driven, and it is checked whether the signal electrode (anode) becomes active or not. When the signal electrode becomes active in the step S106 (YES), the flow branches to the step S108.

In the step S108, the voltage difference Vx between the detection terminal A and the GND, or between the detection terminals A and B, is measured. Then, the voltage drop ΔV at the anode and the cathode is estimated from the driving current value, and the resistance values of the signal electrodes (anode) and the scanning electrodes (cathode). The estimated voltage drop ΔV is subtracted from the voltage difference Vx to obtain the voltage drop Vf of the EL element (step S110). Then, the driving voltage Vd at the minimum limit necessary for driving the EL element, is estimated from the obtained voltage drop Vf and the current value set beforehand (step S112).

In the steps S108 and S110, in short, the voltage difference between the voltage at the portion, where the voltage is increased in the highest degree, and the voltage at the electric source, is obtained.

Then, it is checked whether the maximum value of the driving voltage Vd able to be set, is greater than the estimated driving voltage Vd or not (step S114). If the maximum value able to be set is greater than the estimated value in the step S114 (YES), the flow branches to a step S116, where the driving voltage is set to the estimated value Vd. On the other hand, if the maximum value able to be set is not greater than the estimated value at the step S114 (NO), the flow branches to a step S118, where a message to indicate the life end of the display panel, is displayed, and the operation is ended (step S120).

Next, FIG. 8 shows a modified example of the flow chart of FIG. 7.

In FIG. 8, the steps from S100 to S110, are the same as those in FIG. 7, and the explanations thereof are omitted. From the step S110, the flow goes to a step S122, where the temperature of the display panel Tp is measured by a temperature sensor 80 of FIG. 5. Then, it is checked whether the temperature Tp of the display panel exceeds the upper limit temperature or not (step S124). If the temperature Tp exceeds at the step S124 (YES), the flow branches to a step S126, where the driving current value is decreased. On the other hand, if the temperature Tp does not exceed at the step S124 (NO), the flow branches to a step S128, where the voltage drop Vf of the EL element is corrected on the basis of the temperature Tp of the display panel. After that, the flow proceeds to the steps S112, S114 and S116, which are the same as those in the aforementioned flow chart of FIG. 7. If it is NO at the step S114, a message is displayed which indicates the life end of the display panel (step S118). Then, the driving current value is decreased. Namely, the luminance is decreased (step S130).

FIGS. 9A and 9B show two examples of the constant current driving circuit.

Namely, in FIG. 9A, the source voltage +V is supplied to the constant current source 88 having a current mirror construction. The standard current Iref is supplied to the transistors 90 and 91 in the constant current source 88. The constant current from the constant current source 88 is supplied to the EL element 52 through the signal electrode A0. The signal electrode A0 is diverged and connected to the collector of the transistor 96. The ON/OFF signal for luminance is supplied to the base of the transistor 96.

Then, if the ON/OFF signal for luminance, is at the "High" level, the transistor 96 is in the ON condition. Thus, the constant current of the signal electrodes A0 is flown through the transistor 96, so that the EL element 52 is in the light out (not lighting) condition. On the other hand, if the ON/OFF signal is at the "low" level, the transistor 96 turns to the OFF condition. Thus, the constant current of the signal electrode A0 is supplied to the EL element 52, so that the EL element 52 is in the lighting condition.

In FIG. 9B, the output from a TTL (Transistor Transistor Logic) 132 becomes VOH or VOL depending on the ON/OFF signal for luminance. By this, the transistor 134 becomes in the ON condition or the OFF condition. As a result, the constant current If from the transistor 134, is supplied or not supplied to the EL element 52. Here, the constant current If is expressed by a following expression, when the transistor 134 is in the ON condition.

If=(Vc-V.sub.OL +V.sub.BE)/R

As described above in detail, according to the present embodiment, the driving circuit for the display apparatus is constructed such that the voltage drop at the EL element is measured, and the predetermined voltage is supplied to the driving device in correspondence with the measured voltage drop. Accordingly, if the voltage drop of the EL element becomes large because of the long time usage of the EL element, the high voltage is supplied to the driving device, so that the appropriate lighting condition of the EL element can be maintained. On the other hand, in the initial condition in which the ability of the EL element is not degraded, since the voltage drop of the EL element is small, the low voltage is supplied to the driving device. As a result, the consumption power at the driving circuit can be reduced.

FIG. 10 shows another embodiment of the present invention, which is a driving circuit for the display apparatus of simple matrix (constant current driving) type.

In FIG. 10, a display panel 110 is driven by a X driver 112 and a Y driver 114. The matrix of the display panel 110 is constructed by signal electrodes 116-0, 116-1, 116-2, . . . from the X driver 112 and scanning electrodes 118-0, 118-1, . . . from the Y driver 114. In the display panel 110, EL elements 120 are connected to those signal electrodes and the scanning electrodes at the intersections of those signal electrodes and the scanning electrodes.

The X driver 112 includes constant current sources 122-0, 122-1, 122-2, . . . , and receives PWM modulating signal 126 and the source voltage (+V) from a control computer 124. The X driver 112 outputs a constant current to turn on the EL elements, to the signal electrodes 116-0, 116-1, 116-2, . . . , respectively. The Y driver 114 includes switch elements 128-0, 128-1 ,. . . , which perform ON/OFF operations according to the control signal 129 from the control computer 124, so as to connect and disconnect the scanning electrodes 118-0, 118-1, . . . to the ground GND.

The anode of the EL element 120 is connected to the signal electrodes 116-0, 116-1, 116-2, . . . , and the cathode of the EL element 120 is connected to the scanning electrodes 118-0, 118-1, . . . , respectively. The reference numerals 116a represent resistance of the signal electrode 116, 118a represent the resistance of the scanning electrode 118.

In order to measure the degradation in ability of the EL element 120, voltage detection terminals A and B are installed to the signal electrode 116-0 and the scanning electrode 118-0. When the EL element 120 which is connected to the intersection of the signal electrode 116-0 and the scanning electrode 118-0, is turned to light, the voltage difference between the detection terminals A and B, is measured. Then, the voltage drop of the lines (i.e. the resistance 116a, 118a) is subtracted from the measured voltage difference, to estimate the forward direction voltage drop Vf of the EL element 120. Since there is a mutual relationship between the luminance degradation of the EL element 120 and the voltage drop Vf, the degradation of the EL element can be estimated on the basis of the change in the voltage drop Vf. The degradation of the luminance is compensated by increasing the current value from the constant current source 122.

In addition, when the value of the voltage drop Vf is measured, the detection terminal, which error becomes the smallest, is the terminal where the voltage drop due to the lines is the smallest. Namely, in the construction of FIG. 10, the detection terminals A and B are such terminals which can measure the forward direction voltage drop Vf when the EL element 120 on the left side is driven. However, the voltage drop of the EL element 120 can be estimated by measuring any other detection terminal. Further, by constructing another EL element exclusive for the voltage drop detection, beside the display picture plane, and by measuring the EL element exclusive for the detection, the same procedure can be performed.

The construction of the driving circuit of the present embodiment in FIG. 10, and the construction of the display apparatus including the driving circuit are the same as those explained in FIGS. 2 to 6, and the explanations thereof are omitted.

The characteristic feature of the present embodiment is as following. Namely, in FIG. 6, when the voltage drop Vf of the EL element 52 is obtained in the CPU 54, the CPU 54 outputs the current command on the basis of the obtained voltage drop Vf. This current command is, as aforementioned, supplied to the transistors 90 and 91, in the constant current source 88, through the D/A convertor 64 and the V/I convertor 94. Consequently, the constant current from the constant current source 88, can be controlled to be an appropriate current value.

Nextly, the procedure to control the current value from the constant current source according to the present embodiment, will be explained with referring to a flow chart of FIG. 11.

In FIG. 11, the steps from S100 to S110, are the same as those in FIG.7, and the explanations thereof are omitted. From the step S110, the flow goes to a step S132, where the degree of the degradation in luminance of the EL element is estimated from the obtained voltage drop value Vf, and the current value If to keep the luminance constant is obtained.

Since the voltage drop Vf cannot be directly measured because of the construction of the EL element, the steps S108 and S110 are performed in the present embodiment.

Then, it is checked whether the maximum driving current value which can be set in the driving circuit, is greater than the estimated current value If or not (step S134). If the driving current value to be set is greater than the estimated If value in the step S134 (YES), the flow branches to the step S136, where the estimated If value is set as the new driving current value. On the other hand, if the driving current value to be set is not greater than the estimated If in the step S134 (NO), the flow branches to the step S118, where the message indicating the life end of the EL element, is displayed.

Nextly, FIG. 12 shows a modified example of the flow chart of FIG. 11.

In FIG. 12, the steps from S100 to S110, S118, and S122 to S130, are the same as those in FIG. 8, and the explanations thereof are omitted. From the step S128, the flow goes to a step S142, where the degree of the degradation in luminance of the EL element is estimated from the obtained voltage drop value Vf, and the current value If to keep the luminance constant is obtained.

Then, it is checked whether the maximum driving current value which can be set in the driving circuit, is greater than the estimated current value If or not (step S144). If the maximum driving current value is not greater than estimated current If in the step S144 (NO), the flow branches to the step S118.

On the other hand, if the maximum driving current value is greater than the estimated value If in the step S144 (YES), the flow branches to a step S152, where the maximum current Ik of the scanning electrode is estimated. Then, it is checked whether the value of the estimated maximum current Ik is below the upper limit value of the scanning electrode or not (step S154). If it is below the upper limit in the step S154 (YES), the flow branches to a step S156, where the estimated If value is set as the new driving current value. If it is not below the upper limit in the step S154 (NO), the flow branches to the step S118.

The construction of the constant current driving circuit used in the present embodiment of FIG. 10, is the same as the aforementioned constructions of FIG. 9, and the explanations thereof are omitted.

According to the present embodiment, the driving device is constructed such that the voltage drop of the EL element is measured, and the current from the driving device is controlled in correspondence with the measured voltage drop. Namely, if the luminance characteristic versus current of the EL element is degraded by the long time usage of the EL element, the current from the driving device is increased so that the luminance of the EL element can be kept constant. On the other hand, in the initial condition where the ability of the EL element is not degraded, the current from the driving device is decreased, resulting in that the consumption power at the driving device can be decreased.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (16)

What is claimed is:
1. A driving circuit for a display apparatus having a display panel, which comprises a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL (Electroluminescence) elements connected to the scanning electrodes and the signal electrodes at intersections thereof, said driving circuit comprising:
a driving means for supplying a constant current driving signal to said signal electrodes in correspondence with an input signal, to drive said display panel;
a detection means for detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop;
a control means for controlling voltage, which is supplied to said driving means, to have a predetermined voltage value for maintaining said driving means with respect to said EL elements in an initial usage condition and controlling the voltage to have an increased voltage value larger than the predetermined voltage value for compensating a voltage drop component of said EL elements due to degradation of said EL elements with respect to said EL elements in a used condition, in correspondence with the detection signal from said detection means; and
a temperature detection means for detecting a temperature of said display panel, said control means correcting the detected voltage drop of the detection signal on the basis of the detected temperature.
2. A driving circuit according to claim 1, wherein said control means checks whether the detected temperature exceeds an upper limit temperature of said display panel or not, and controls said driving means to decrease the current value of the constant current driving signal if the detected temperature exceeds the upper limit.
3. A driving circuit according to claim 1, wherein a detection terminal is installed to at least one of the signal electrodes and the scanning electrodes, where the voltage drop is detected by said detection means.
4. A driving circuit according to claim 3 wherein said detection terminal is installed to at least one of the signal electrode and the scanning electrode corresponding to a central portion of a picture plane of said display panel.
5. A driving circuit according to claim 1, wherein said control means controls the voltage to have a low voltage value when the detection means detects a small voltage drop, and controls the voltage to have a high voltage value when the detection means detects a large voltage drop.
6. A driving circuit for a display apparatus having a display panel, which comprises a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL (Electroluminescence) elements connected to the scanning electrodes and the signal electrodes at intersections thereof, said driving circuit comprising:
a driving means for supplying a constant current driving signal to said signal electrodes in correspondence with an input signal, to drive said display panel;
a detection means for detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop;
a control means for controlling the constant current driving signal, which is supplied from said driving means, to have a predetermined current value for maintaining said EL elements with respect to said EL elements in an initial usage condition and controlling the constant current driving signal to have an increased current value larger than the predetermined current value for keeping the luminance of said EL elements constant by compensating a voltage drop component of said EL elements due to degradation of said EL elements with respect to said EL elements in a used condition, in correspondence with the detection signal from said detection means; and
a temperature detection means for detecting a temperature of said display panel, said control means correcting the detected voltage drop of the detection signal on the basis of the detected temperature.
7. A driving circuit according to claim 6, wherein said control means checks whether the detected temperature exceeds an upper limit temperature of said display panel or not, and controls said driving means to decrease the current value of the constant current driving signal if the detected temperature exceeds the upper limit.
8. A driving circuit according to claim 6, wherein a detection terminal is installed to at least one of the signal electrodes and the scanning electrodes, where the voltage drop is detected by said detection means.
9. A driving circuit according to claim 8 wherein said detection terminal is installed to at least one of the signal electrode and the scanning electrode corresponding to a central portion of a picture plane of said display panel.
10. A driving circuit according to claim 6, wherein said control means controls the constant current driving signal to have a low current value when the detection means detects a small voltage drop, and controls the constant current driving signal to have a high current value when the detection means detects a large voltage drop.
11. A method of driving a display apparatus having a display panel, which comprises a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL (Electroluminescence) elements connected to the scanning electrodes and the signal electrodes at intersections thereof, said method comprising the steps of:
supplying a constant current driving signal to said signal electrodes in correspondence with an input signal, to drive said display panel by a driving device;
detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop;
controlling voltage, which is supplied to said driving device, to have a predetermined voltage value for maintaining said driving device with respect to said EL elements in an initial usage condition and controlling the voltage to have an increased voltage value larger than the predetermined voltage value for compensating a voltage drop component of said EL elements due to degradation of said EL elements with respect to said EL elements in a used condition, in correspondence with the detection signal;
detecting a temperature of said display panel; and
correcting the detected voltage drop of the detection signal on the basis of the detected temperature.
12. A method according to claim 11, wherein, in the controlling step, it is checks whether the detected temperature exceeds an upper limit temperature of said display panel or not, and the current value of the constant current driving signal is decreased if the detected temperature exceeds the upper limit.
13. A method according to claim 11, wherein, in the controlling step, the voltage is controlled to have a low voltage value when a small voltage drop is detected in the detecting step, and the voltage is controlled to have a high voltage value when a large voltage drop is detected in the detecting step.
14. A method of driving a display apparatus having a display panel, which comprises a plurality of scanning electrodes and a plurality of signal electrodes arranged in a matrix shape, and a plurality of EL (Electroluminescence) elements connected to the scanning electrodes and the signal electrodes at intersections thereof, said method comprising the steps of:
supplying a constant current driving signal to said signal electrodes in correspondence with an input signal, to drive said display panel;
detecting a voltage drop in a forward direction of the EL element, and outputting a detection signal which indicates the detected voltage drop;
controlling the constant current driving signal to have a predetermined current value for maintaining said EL elements with respect to said EL elements in an initial usage condition and controlling the constant current driving signal to have an increased current value larger than the predetermined current value for keeping the luminance of said EL elements constant by compensating a voltage drop component of said EL elements due to degradation of said EL elements with respect to said EL elements in a used condition, in correspondence with the detection signal;
detecting a temperature of said display panel; and
correcting the detected voltage drop of the detection signal on the basis of the detected temperature.
15. A method according to claim 14, wherein, in the controlling step, it is checks whether the detected temperature exceeds an upper limit temperature of said display panel or not, and the current value of the constant current driving signal is decreased if the detected temperature exceeds the upper limit.
16. A method according to claim 14, wherein, in the controlling step, the constant current driving signal is controlled to have a low current value when a small voltage drop is detected in the detecting step, and the constant current driving signal is controlled to have a high current value when a large voltage drop is detected in the detecting step.
US08/273,816 1993-07-19 1994-07-12 Driving circuit for display apparatus, and method of driving display apparatus Expired - Lifetime US5594463A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5-178325 1993-07-19
JP5-178326 1993-07-19
JP17832593A JP3313830B2 (en) 1993-07-19 1993-07-19 The drive circuit of the display device
JP17832693A JP3390214B2 (en) 1993-07-19 1993-07-19 The drive circuit of the display device

Publications (1)

Publication Number Publication Date
US5594463A true US5594463A (en) 1997-01-14

Family

ID=26498533

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/273,816 Expired - Lifetime US5594463A (en) 1993-07-19 1994-07-12 Driving circuit for display apparatus, and method of driving display apparatus

Country Status (1)

Country Link
US (1) US5594463A (en)

Cited By (104)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866440A2 (en) * 1997-03-15 1998-09-23 Dambach-Werke GmbH LED matrix display
US5818411A (en) * 1995-04-24 1998-10-06 Sharp Kabushiki Kaisha Liquid crystal display device
WO1998052182A1 (en) * 1997-05-14 1998-11-19 Unisplay S.A. Display system with brightness correction
US5900851A (en) * 1998-05-13 1999-05-04 Ut Automotive Dearborn, Inc. Electroluminescent panel drive optimization
EP0923067A1 (en) * 1997-03-12 1999-06-16 Seiko Epson Corporation Pixel circuit, display device and electronic equipment having current-driven light-emitting device
US6081073A (en) * 1995-12-19 2000-06-27 Unisplay S.A. Matrix display with matched solid-state pixels
US6104363A (en) * 1996-05-29 2000-08-15 Fuji Electric Co., Ltd. Display element driving method
EP1033902A2 (en) * 1999-03-04 2000-09-06 Pioneer Corporation Display apparatus of capacitive light emitting devices
EP1057167A1 (en) * 1998-02-18 2000-12-06 Cambridge Display Technology Limited Electroluminescent devices
WO2001027910A1 (en) 1999-10-12 2001-04-19 Koninklijke Philips Electronics N.V. Led display device
US20010033252A1 (en) * 2000-04-18 2001-10-25 Shunpei Yamazaki Display device
US6329758B1 (en) * 1994-12-20 2001-12-11 Unisplay S.A. LED matrix display with intensity and color matching of the pixels
EP1168291A2 (en) * 2000-06-13 2002-01-02 Semiconductor Energy Laboratory Co., Ltd. Display device
US6359605B1 (en) 1998-06-12 2002-03-19 U.S. Philips Corporation Active matrix electroluminescent display devices
US6376994B1 (en) * 1999-01-22 2002-04-23 Pioneer Corporation Organic EL device driving apparatus having temperature compensating function
WO2002033689A1 (en) * 2000-10-19 2002-04-25 Matsushita Electric Industrial Co., Ltd. Driving method and driving apparatus for a field emission device
WO2002075713A1 (en) * 2001-03-21 2002-09-26 Canon Kabushiki Kaisha Drive circuit for driving active-matrix light-emitting element
US20020167505A1 (en) * 2001-05-09 2002-11-14 Lechevalier Robert Method for periodic element voltage sensing to control precharge
US20020167478A1 (en) * 2001-05-09 2002-11-14 Lechevalier Robert Apparatus for periodic element voltage sensing to control precharge
US20020183945A1 (en) * 2001-05-09 2002-12-05 Everitt James W. Method of sensing voltage for precharge
US6501226B2 (en) * 2001-01-19 2002-12-31 Solomon Systech Limited Driving system and method for electroluminescence display
EP1282102A2 (en) * 2001-07-31 2003-02-05 Eastman Kodak Company Light emitting flat-panel display
US20030025687A1 (en) * 2001-07-31 2003-02-06 Kenji Shino Scanning circuit and image display device
US20030043090A1 (en) * 2001-09-06 2003-03-06 Tohoku Pioneer Corporation Apparatus and method for driving luminescent display panel
US20030048243A1 (en) * 2001-09-11 2003-03-13 Kwasnick Robert F. Compensating organic light emitting device displays for temperature effects
US20030071804A1 (en) * 2001-09-28 2003-04-17 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus using the same
WO2003033749A1 (en) * 2001-10-19 2003-04-24 Clare Micronix Integrated Syst Matrix element precharge voltage adjusting apparatus and method
US20030090446A1 (en) * 2001-11-09 2003-05-15 Akira Tagawa Display and driving method thereof
US20030103019A1 (en) * 2001-12-01 2003-06-05 Lg Electronics Inc. Cooling apparatus of plasma display panel and method for stabilizing plasma display panel
US20030128200A1 (en) * 2000-11-07 2003-07-10 Akira Yumoto Active matrix display and active matrix organic electroluminescence display
EP1329873A2 (en) * 2002-01-18 2003-07-23 Tohoku Pioneer Corp. Drive method of light-emitting display panel and organic EL display device
US20030151570A1 (en) * 2001-10-19 2003-08-14 Lechevalier Robert E. Ramp control boost current method
US6607277B2 (en) * 1996-09-24 2003-08-19 Seiko Epson Corporation Projector display comprising light source units
US20030169250A1 (en) * 2001-10-30 2003-09-11 Hajime Kimura Signal line driver circuit, light emitting device and driving method thereof
US20030169241A1 (en) * 2001-10-19 2003-09-11 Lechevalier Robert E. Method and system for ramp control of precharge voltage
US6621475B1 (en) * 1996-02-23 2003-09-16 Canon Kabushiki Kaisha Electron generating apparatus, image forming apparatus, method of manufacturing the same and method of adjusting characteristics thereof
GB2389952A (en) * 2002-06-18 2003-12-24 Cambridge Display Tech Ltd Driver circuits for electroluminescent displays with reduced power consumption
GB2389951A (en) * 2002-06-18 2003-12-24 Cambridge Display Tech Ltd Display driver circuits for active matrix OLED displays
EP1381019A1 (en) * 2002-07-10 2004-01-14 Pioneer Corporation Automatic luminance adjustment device and method
US20040008072A1 (en) * 2002-03-06 2004-01-15 Hajime Kimura Semiconductor integrated circuit and method of driving the same
EP1383103A1 (en) 2002-07-19 2004-01-21 St Microelectronics S.A. Automatic adaptation of the supply voltage of an electroluminescent panel depending on the desired luminance
US20040021654A1 (en) * 2002-07-19 2004-02-05 Celine Mas Image display on an array screen
WO2004019311A2 (en) 2002-08-21 2004-03-04 Koninklijke Philips Electronics N.V. Display device
US20040051725A1 (en) * 2002-07-19 2004-03-18 Celine Mas Display of an image on an array screen by selective addressing of screen lines
US20040070331A1 (en) * 1998-05-01 2004-04-15 Canon Kabushiki Kaisha Image display apparatus and control method thereof
US6734639B2 (en) 2001-08-15 2004-05-11 Koninklijke Philips Electronics N.V. Sample and hold method to achieve square-wave PWM current source for light emitting diode arrays
EP1445757A1 (en) * 2001-11-16 2004-08-11 Nippon Seiki Co., Ltd. Organic el panel drive circuit
US20040232952A1 (en) * 2003-01-17 2004-11-25 Hajime Kimura Current source circuit, a signal line driver circuit and a driving method thereof and a light emitting device
US20040257352A1 (en) * 2003-06-18 2004-12-23 Nuelight Corporation Method and apparatus for controlling
US20040257356A1 (en) * 2001-10-12 2004-12-23 Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation Drive circuit, display device using the drive circuit and electronic apparatus using the display device
US20050007328A1 (en) * 2000-11-21 2005-01-13 Canon Kabushiki Kaisha Display apparatus and display method
US20050017922A1 (en) * 2003-07-22 2005-01-27 Barco, Naamloze Vennottschap Method for controlling an organic light-emitting diode display, and display applying this method
EP1505565A1 (en) * 2003-08-07 2005-02-09 Barco N.V. Method and system for controlling an OLED display element for improved lifetime and light output
US20050057580A1 (en) * 2001-09-25 2005-03-17 Atsuhiro Yamano El display panel and el display apparatus comprising it
US20050062685A1 (en) * 2003-06-09 2005-03-24 Masashi Nogawa Drive circuit and display system with said drive circuit
WO2005055186A1 (en) * 2003-11-25 2005-06-16 Eastman Kodak Company An oled display with aging compensation
US20050140610A1 (en) * 2002-03-14 2005-06-30 Smith Euan C. Display driver circuits
EP1556847A1 (en) * 2002-10-31 2005-07-27 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US20050180083A1 (en) * 2002-04-26 2005-08-18 Toshiba Matsushita Display Technology Co., Ltd. Drive circuit for el display panel
US20050200296A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Method and device for flat panel emissive display using shielded or partially shielded sensors to detect user screen inputs
US20050200294A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Sidelight illuminated flat panel display and touch panel input device
US20050200292A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Emissive display device having sensing for luminance stabilization and user light or touch screen input
US20050200293A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Penlight and touch screen data input system and method for flat panel displays
US20050206605A1 (en) * 2004-03-18 2005-09-22 Jheen-Hyeok Park Display device and driving apparatus thereof
US20050225519A1 (en) * 2004-04-12 2005-10-13 The Board Of Trustees Of The Leland Stanford Junior University Low power circuits for active matrix emissive displays and methods of operating the same
EP1587056A1 (en) * 2004-04-16 2005-10-19 Sanyo Electric Co., Ltd. Current driven emissive display device
WO2005098806A1 (en) * 2004-04-08 2005-10-20 Stmicroelectronics S.R.L. Driver for an oled passive-matrix display
US20050243023A1 (en) * 2004-04-06 2005-11-03 Damoder Reddy Color filter integrated with sensor array for flat panel display
US20050248515A1 (en) * 2004-04-28 2005-11-10 Naugler W E Jr Stabilized active matrix emissive display
US6975289B1 (en) * 1998-05-16 2005-12-13 International Business Machines Corporation Active correction technique for a magnetic matrix display
US20050285823A1 (en) * 2004-05-22 2005-12-29 Hajime Kimura Display device and electronic device
US20060038804A1 (en) * 2004-05-21 2006-02-23 Masahiko Hayakawa Display device and electronic device
US20060055631A1 (en) * 2004-08-31 2006-03-16 Tohoku Pioneer Corporation Drive device of light emitting display panel
US20060119552A1 (en) * 2000-11-07 2006-06-08 Akira Yumoto Active-matrix display device, and active-matrix organic electroluminescent display device
US20060118699A1 (en) * 2004-12-06 2006-06-08 Semiconductor Energy Laboratory Co., Ltd. Light emitting device
US20060139254A1 (en) * 2004-06-29 2006-06-29 Masahiko Hayakawa Display device and driving method of the same, and electronic apparatus
US20060158393A1 (en) * 2004-12-06 2006-07-20 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US20060244699A1 (en) * 2005-05-02 2006-11-02 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus
US20070146249A1 (en) * 2001-10-30 2007-06-28 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit and light emitting device and driving method therefor
US20070159742A1 (en) * 2005-12-28 2007-07-12 Semiconductor Energy Laboratory Co., Ltd. Display device and method for inspecting the same
US20070182675A1 (en) * 2004-07-23 2007-08-09 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US7262753B2 (en) 2003-08-07 2007-08-28 Barco N.V. Method and system for measuring and controlling an OLED display element for improved lifetime and light output
US20080143657A1 (en) * 2004-10-12 2008-06-19 Genoa Color Technologies Ltd. Method, Device and System of Response Time Compensation
US20090033649A1 (en) * 2001-10-30 2009-02-05 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit, light emitting device, and method for driving the same
GB2453373A (en) * 2007-10-05 2009-04-08 Cambridge Display Tech Ltd Voltage controlled display driver for an electroluminescent display
WO2009044122A1 (en) * 2007-10-05 2009-04-09 Cambridge Display Technology Limited Method of driving an electro-optic display
US20090224676A1 (en) * 2004-08-13 2009-09-10 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
CN100550101C (en) 2005-07-07 2009-10-14 东北先锋公司 Drive apparatus and drive method for light-emitting display panel
US20090289655A1 (en) * 2008-05-23 2009-11-26 Lee Jeong-Yeop Process condition evaluation method for liquid crystal display module
US20090317172A1 (en) * 2006-04-12 2009-12-24 SOCIéTé BIC Writing Tip For Tracing Lines of Different Widths and Writing Implement Comprising Such a Tip
US7791566B2 (en) 2001-10-31 2010-09-07 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US20100245302A1 (en) * 2000-06-06 2010-09-30 Semiconductor Energy Laboratory Co., Ltd. Display device
CN101263543B (en) 2005-09-12 2011-03-02 剑桥显示技术有限公司 Active matrix display drive control systems
US20110170745A1 (en) * 2010-01-13 2011-07-14 Chao-Lieh Chen Body Gesture Control System for Operating Electrical and Electronic Devices
US8194006B2 (en) 2004-08-23 2012-06-05 Semiconductor Energy Laboratory Co., Ltd. Display device, driving method of the same, and electronic device comprising monitoring elements
US20120139955A1 (en) * 2010-12-02 2012-06-07 Ignis Innovation Inc. System and methods for thermal compensation in amoled displays
US9825202B2 (en) 2014-10-31 2017-11-21 eLux, Inc. Display with surface mount emissive elements
US10236279B2 (en) 2014-10-31 2019-03-19 eLux, Inc. Emissive display with light management system
US10242977B2 (en) 2014-10-31 2019-03-26 eLux, Inc. Fluid-suspended microcomponent harvest, distribution, and reclamation
US10319878B2 (en) 2014-10-31 2019-06-11 eLux, Inc. Stratified quantum dot phosphor structure
US10381335B2 (en) 2014-10-31 2019-08-13 ehux, Inc. Hybrid display using inorganic micro light emitting diodes (uLEDs) and organic LEDs (OLEDs)
US10381332B2 (en) 2014-10-31 2019-08-13 eLux Inc. Fabrication method for emissive display with light management system
US10418527B2 (en) 2014-10-31 2019-09-17 eLux, Inc. System and method for the fluidic assembly of emissive displays
US10446728B2 (en) 2014-10-31 2019-10-15 eLux, Inc. Pick-and remove system and method for emissive display repair

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736137A (en) * 1986-08-01 1988-04-05 Hitachi, Ltd Matrix display device
US4983885A (en) * 1984-09-28 1991-01-08 Sharp Kabushiki Kaisha Thin film EL display panel drive circuit
US5066945A (en) * 1987-10-26 1991-11-19 Canon Kabushiki Kaisha Driving apparatus for an electrode matrix suitable for a liquid crystal panel
US5093654A (en) * 1989-05-17 1992-03-03 Eldec Corporation Thin-film electroluminescent display power supply system for providing regulated write voltages
US5311169A (en) * 1988-06-07 1994-05-10 Sharp Kabushiki Kaisha Method and apparatus for driving capacitive display device
US5315695A (en) * 1990-06-25 1994-05-24 Kabushiki Kaisha Toshiba Personal computer capable of altering display luminance through key operation
US5451978A (en) * 1992-05-15 1995-09-19 Planar International Oy Ltd. Method and device for driving an electroluminescence matrix display

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4983885A (en) * 1984-09-28 1991-01-08 Sharp Kabushiki Kaisha Thin film EL display panel drive circuit
US4736137A (en) * 1986-08-01 1988-04-05 Hitachi, Ltd Matrix display device
US5066945A (en) * 1987-10-26 1991-11-19 Canon Kabushiki Kaisha Driving apparatus for an electrode matrix suitable for a liquid crystal panel
US5311169A (en) * 1988-06-07 1994-05-10 Sharp Kabushiki Kaisha Method and apparatus for driving capacitive display device
US5093654A (en) * 1989-05-17 1992-03-03 Eldec Corporation Thin-film electroluminescent display power supply system for providing regulated write voltages
US5315695A (en) * 1990-06-25 1994-05-24 Kabushiki Kaisha Toshiba Personal computer capable of altering display luminance through key operation
US5451978A (en) * 1992-05-15 1995-09-19 Planar International Oy Ltd. Method and device for driving an electroluminescence matrix display

Cited By (279)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6329758B1 (en) * 1994-12-20 2001-12-11 Unisplay S.A. LED matrix display with intensity and color matching of the pixels
US5818411A (en) * 1995-04-24 1998-10-06 Sharp Kabushiki Kaisha Liquid crystal display device
US6081073A (en) * 1995-12-19 2000-06-27 Unisplay S.A. Matrix display with matched solid-state pixels
US6621475B1 (en) * 1996-02-23 2003-09-16 Canon Kabushiki Kaisha Electron generating apparatus, image forming apparatus, method of manufacturing the same and method of adjusting characteristics thereof
US6104363A (en) * 1996-05-29 2000-08-15 Fuji Electric Co., Ltd. Display element driving method
US20040027545A1 (en) * 1996-09-24 2004-02-12 Seiko Epson Corporation Projector display comprising light source units
US6607277B2 (en) * 1996-09-24 2003-08-19 Seiko Epson Corporation Projector display comprising light source units
US6805448B2 (en) 1996-09-24 2004-10-19 Seiko Epson Corporation Projector display comprising light source units
US20030063081A1 (en) * 1997-03-12 2003-04-03 Seiko Epson Corporation Pixel circuit, display apparatus and electronic apparatus equipped with current driving type light-emitting device
US6518962B2 (en) 1997-03-12 2003-02-11 Seiko Epson Corporation Pixel circuit display apparatus and electronic apparatus equipped with current driving type light-emitting device
EP0923067A1 (en) * 1997-03-12 1999-06-16 Seiko Epson Corporation Pixel circuit, display device and electronic equipment having current-driven light-emitting device
EP0923067A4 (en) * 1997-03-12 2000-02-23 Seiko Epson Corp Pixel circuit, display device and electronic equipment having current-driven light-emitting device
US7362322B2 (en) 1997-03-12 2008-04-22 Seiko Epson Corporation Pixel circuit, display apparatus and electronic apparatus equipped with current driving type light-emitting device
EP0866440A2 (en) * 1997-03-15 1998-09-23 Dambach-Werke GmbH LED matrix display
EP0866440A3 (en) * 1997-03-15 2001-02-07 Dambach-Werke GmbH LED matrix display
WO1998052182A1 (en) * 1997-05-14 1998-11-19 Unisplay S.A. Display system with brightness correction
EP1057167A1 (en) * 1998-02-18 2000-12-06 Cambridge Display Technology Limited Electroluminescent devices
EP1057167B1 (en) * 1998-02-18 2012-05-02 Cambridge Display Technology Limited Organic electroluminescent devices
US20070085777A1 (en) * 1998-05-01 2007-04-19 Canon Kabushiki Kaisha Image display apparatus and control method thereof
US7180514B2 (en) * 1998-05-01 2007-02-20 Canon Kabushiki Kaisha Image display apparatus and control method thereof
US20040070331A1 (en) * 1998-05-01 2004-04-15 Canon Kabushiki Kaisha Image display apparatus and control method thereof
US5900851A (en) * 1998-05-13 1999-05-04 Ut Automotive Dearborn, Inc. Electroluminescent panel drive optimization
US6975289B1 (en) * 1998-05-16 2005-12-13 International Business Machines Corporation Active correction technique for a magnetic matrix display
US20020126073A1 (en) * 1998-06-12 2002-09-12 Philips Corporation Active matrix electroluminescent display devices
US8593376B2 (en) 1998-06-12 2013-11-26 Koninklijke Philips N.V. Active matrix electroluminescent display devices
US6359605B1 (en) 1998-06-12 2002-03-19 U.S. Philips Corporation Active matrix electroluminescent display devices
US6376994B1 (en) * 1999-01-22 2002-04-23 Pioneer Corporation Organic EL device driving apparatus having temperature compensating function
EP1033902A3 (en) * 1999-03-04 2004-08-18 Pioneer Corporation Display apparatus of capacitive light emitting devices
EP1033902A2 (en) * 1999-03-04 2000-09-06 Pioneer Corporation Display apparatus of capacitive light emitting devices
WO2001027910A1 (en) 1999-10-12 2001-04-19 Koninklijke Philips Electronics N.V. Led display device
US20050012731A1 (en) * 2000-04-18 2005-01-20 Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation Display device
US7623099B2 (en) 2000-04-18 2009-11-24 Semiconductor Energy Laboratory Co., Ltd. Display device
US7623100B2 (en) 2000-04-18 2009-11-24 Semiconductor Energy Laboratory Co., Ltd. Display device
US20050017964A1 (en) * 2000-04-18 2005-01-27 Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation Display device
US9196663B2 (en) 2000-04-18 2015-11-24 Semiconductor Energy Laboratory Co., Ltd. Display device
US7623098B2 (en) 2000-04-18 2009-11-24 Semiconductor Energy Laboratory Co., Ltd. Display device
US20110140997A1 (en) * 2000-04-18 2011-06-16 Semiconductor Energy Laboratory Co., Ltd. Display device
US20050017963A1 (en) * 2000-04-18 2005-01-27 Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation Display device
US20010033252A1 (en) * 2000-04-18 2001-10-25 Shunpei Yamazaki Display device
US8194008B2 (en) 2000-04-18 2012-06-05 Semiconductor Energy Laboratory Co., Ltd. Display device
US7221338B2 (en) 2000-04-18 2007-05-22 Semiconductor Energy Laboratory Co., Ltd. Display device
US8400379B2 (en) 2000-04-18 2013-03-19 Semiconductor Energy Laboratory Co., Ltd. Display device
US7990348B2 (en) 2000-04-18 2011-08-02 Semiconductor Energy Laboratory Co., Ltd. Display device
US8638278B2 (en) 2000-04-18 2014-01-28 Semiconductor Energy Laboratory Co., Ltd. Display device
US8659516B2 (en) 2000-06-06 2014-02-25 Semiconductor Energy Laboratory Co., Ltd. Display device
US20100245302A1 (en) * 2000-06-06 2010-09-30 Semiconductor Energy Laboratory Co., Ltd. Display device
US8289241B2 (en) 2000-06-06 2012-10-16 Semiconductor Energy Laboratory Co., Ltd. Display device
EP1168291A3 (en) * 2000-06-13 2010-10-06 Semiconductor Energy Laboratory Co., Ltd. Display device
EP1168291A2 (en) * 2000-06-13 2002-01-02 Semiconductor Energy Laboratory Co., Ltd. Display device
US7298347B2 (en) 2000-06-13 2007-11-20 Semiconductor Energy Laboratory Co., Ltd. Display device
US20030132716A1 (en) * 2000-06-13 2003-07-17 Semiconductor Energy Laboratory Co., Ltd, A Japan Corporation Display device
WO2002033689A1 (en) * 2000-10-19 2002-04-25 Matsushita Electric Industrial Co., Ltd. Driving method and driving apparatus for a field emission device
US7190334B2 (en) 2000-10-19 2007-03-13 Matsushita Electric Industrial Co., Ltd. Driving method and driving apparatus for a field emission device
US20040004588A1 (en) * 2000-10-19 2004-01-08 Toru Kawase Driving method and driving apparatus for a field emission device
CN100403361C (en) * 2000-10-19 2008-07-16 松下电器产业株式会社 Driving method and driving apparatus for field emission device
US8810486B2 (en) 2000-11-07 2014-08-19 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US8120551B2 (en) 2000-11-07 2012-02-21 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US7015882B2 (en) 2000-11-07 2006-03-21 Sony Corporation Active matrix display and active matrix organic electroluminescence display
US20060119552A1 (en) * 2000-11-07 2006-06-08 Akira Yumoto Active-matrix display device, and active-matrix organic electroluminescent display device
US10269296B2 (en) 2000-11-07 2019-04-23 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US9741289B2 (en) 2000-11-07 2017-08-22 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US20030128200A1 (en) * 2000-11-07 2003-07-10 Akira Yumoto Active matrix display and active matrix organic electroluminescence display
US9245481B2 (en) 2000-11-07 2016-01-26 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US8558769B2 (en) 2000-11-07 2013-10-15 Sony Corporation Active-matrix display device, and active-matrix organic electroluminescent display device
US20050007328A1 (en) * 2000-11-21 2005-01-13 Canon Kabushiki Kaisha Display apparatus and display method
US7995020B2 (en) * 2000-11-21 2011-08-09 Canon Kabushiki Kaisha Display apparatus and display method
US6501226B2 (en) * 2001-01-19 2002-12-31 Solomon Systech Limited Driving system and method for electroluminescence display
WO2002075713A1 (en) * 2001-03-21 2002-09-26 Canon Kabushiki Kaisha Drive circuit for driving active-matrix light-emitting element
US6670773B2 (en) 2001-03-21 2003-12-30 Canon Kabushiki Kaisha Drive circuit for active matrix light emitting device
US20020183945A1 (en) * 2001-05-09 2002-12-05 Everitt James W. Method of sensing voltage for precharge
US7079131B2 (en) 2001-05-09 2006-07-18 Clare Micronix Integrated Systems, Inc. Apparatus for periodic element voltage sensing to control precharge
US20020167505A1 (en) * 2001-05-09 2002-11-14 Lechevalier Robert Method for periodic element voltage sensing to control precharge
US20020167478A1 (en) * 2001-05-09 2002-11-14 Lechevalier Robert Apparatus for periodic element voltage sensing to control precharge
US7079130B2 (en) 2001-05-09 2006-07-18 Clare Micronix Integrated Systems, Inc. Method for periodic element voltage sensing to control precharge
US20030025687A1 (en) * 2001-07-31 2003-02-06 Kenji Shino Scanning circuit and image display device
US20060256101A1 (en) * 2001-07-31 2006-11-16 Canon Kabushiki Kaisha Scanning circuit and image display device
EP1282102A3 (en) * 2001-07-31 2006-05-03 Eastman Kodak Company Light emitting flat-panel display
EP1282102A2 (en) * 2001-07-31 2003-02-05 Eastman Kodak Company Light emitting flat-panel display
US7126597B2 (en) * 2001-07-31 2006-10-24 Canon Kabushiki Kaisha Scanning circuit and image display device
US7746338B2 (en) 2001-07-31 2010-06-29 Canon Kabushiki Kaisha Scanning circuit and image display device
US6734639B2 (en) 2001-08-15 2004-05-11 Koninklijke Philips Electronics N.V. Sample and hold method to achieve square-wave PWM current source for light emitting diode arrays
US20030043090A1 (en) * 2001-09-06 2003-03-06 Tohoku Pioneer Corporation Apparatus and method for driving luminescent display panel
EP1291838A1 (en) * 2001-09-06 2003-03-12 Tohoku Pioneer Corporation Apparatus and method for driving luminescent display panel
US7119768B2 (en) 2001-09-06 2006-10-10 Tohoku Pioneer Corporation Apparatus and method for driving luminescent display panel
US20030048243A1 (en) * 2001-09-11 2003-03-13 Kwasnick Robert F. Compensating organic light emitting device displays for temperature effects
US7446743B2 (en) * 2001-09-11 2008-11-04 Intel Corporation Compensating organic light emitting device displays for temperature effects
US20050057580A1 (en) * 2001-09-25 2005-03-17 Atsuhiro Yamano El display panel and el display apparatus comprising it
US20030071804A1 (en) * 2001-09-28 2003-04-17 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus using the same
US20060103684A1 (en) * 2001-09-28 2006-05-18 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus using the same
US7586505B2 (en) 2001-09-28 2009-09-08 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus using the same
US7158157B2 (en) 2001-09-28 2007-01-02 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus using the same
US7372437B2 (en) 2001-10-12 2008-05-13 Semiconductor Energy Laboratory Co., Ltd. Drive circuit, display device using the drive circuit and electronic apparatus using the display device
US20040257356A1 (en) * 2001-10-12 2004-12-23 Semiconductor Energy Laboratory Co., Ltd., A Japan Corporation Drive circuit, display device using the drive circuit and electronic apparatus using the display device
WO2003033749A1 (en) * 2001-10-19 2003-04-24 Clare Micronix Integrated Syst Matrix element precharge voltage adjusting apparatus and method
US6943500B2 (en) * 2001-10-19 2005-09-13 Clare Micronix Integrated Systems, Inc. Matrix element precharge voltage adjusting apparatus and method
US7050024B2 (en) 2001-10-19 2006-05-23 Clare Micronix Integrated Systems, Inc. Predictive control boost current method and apparatus
US7019720B2 (en) 2001-10-19 2006-03-28 Clare Micronix Integrated Systems, Inc. Adaptive control boost current method and apparatus
WO2003034386A2 (en) * 2001-10-19 2003-04-24 Clare Micronix Integrated Systems, Inc. Method and system for ramp control of precharge voltage
WO2003033749A3 (en) * 2001-10-19 2004-01-29 Clare Micronix Integrated Syst Matrix element precharge voltage adjusting apparatus and method
WO2003034391A3 (en) * 2001-10-19 2004-04-01 Clare Micronix Integrated Syst Method and system for adjusting the voltage of a precharge circuit
WO2003034384A2 (en) * 2001-10-19 2003-04-24 Clare Micronix Integrated Systems, Inc. Method and system for precharging oled/pled displays with a precharge latency
US20040004590A1 (en) * 2001-10-19 2004-01-08 Lechevalier Robert Method and system for adjusting precharge for consistent exposure voltage
US20040085086A1 (en) * 2001-10-19 2004-05-06 Lechevalier Robert Predictive control boost current method and apparatus
WO2003034384A3 (en) * 2001-10-19 2003-12-18 Clare Micronix Integrated Syst Method and system for precharging oled/pled displays with a precharge latency
US7126568B2 (en) 2001-10-19 2006-10-24 Clare Micronix Integrated Systems, Inc. Method and system for precharging OLED/PLED displays with a precharge latency
WO2003034386A3 (en) * 2001-10-19 2003-10-16 Clare Micronix Integrated Syst Method and system for ramp control of precharge voltage
US20030173904A1 (en) * 2001-10-19 2003-09-18 Lechevalier Robert Matrix element precharge voltage adjusting apparatus and method
US20030169241A1 (en) * 2001-10-19 2003-09-11 Lechevalier Robert E. Method and system for ramp control of precharge voltage
US20030142088A1 (en) * 2001-10-19 2003-07-31 Lechevalier Robert Method and system for precharging OLED/PLED displays with a precharge latency
US20030156101A1 (en) * 2001-10-19 2003-08-21 Lechevalier Robert Adaptive control boost current method and apparatus
US6995737B2 (en) * 2001-10-19 2006-02-07 Clare Micronix Integrated Systems, Inc. Method and system for adjusting precharge for consistent exposure voltage
WO2003034391A2 (en) * 2001-10-19 2003-04-24 Clare Micronix Integrated Systems, Inc. Method and system for adjusting the voltage of a precharge circuit
US20030151570A1 (en) * 2001-10-19 2003-08-14 Lechevalier Robert E. Ramp control boost current method
US20030169250A1 (en) * 2001-10-30 2003-09-11 Hajime Kimura Signal line driver circuit, light emitting device and driving method thereof
US20070146249A1 (en) * 2001-10-30 2007-06-28 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit and light emitting device and driving method therefor
US20090033649A1 (en) * 2001-10-30 2009-02-05 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit, light emitting device, and method for driving the same
US8624802B2 (en) 2001-10-30 2014-01-07 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit and light emitting device and driving method therefor
US7742064B2 (en) 2001-10-30 2010-06-22 Semiconductor Energy Laboratory Co., Ltd Signal line driver circuit, light emitting device and driving method thereof
US8325165B2 (en) 2001-10-30 2012-12-04 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit, light emitting device, and method for driving the same
US8314754B2 (en) 2001-10-30 2012-11-20 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit, light emitting device and driving method thereof
US8164548B2 (en) 2001-10-30 2012-04-24 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit and light emitting device and driving method therefor
US7576734B2 (en) 2001-10-30 2009-08-18 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit, light emitting device, and method for driving the same
US7961159B2 (en) 2001-10-30 2011-06-14 Semiconductor Energy Laboratory Co., Ltd. Signal line driver circuit, light emitting device and driving method thereof
US8294640B2 (en) 2001-10-31 2012-10-23 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US8593377B2 (en) 2001-10-31 2013-11-26 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US20110205216A1 (en) * 2001-10-31 2011-08-25 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US7940235B2 (en) 2001-10-31 2011-05-10 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US7791566B2 (en) 2001-10-31 2010-09-07 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US20110012645A1 (en) * 2001-10-31 2011-01-20 Semiconductor Energy Laboratory Co., Ltd. Signal line driving circuit and light emitting device
US20030090446A1 (en) * 2001-11-09 2003-05-15 Akira Tagawa Display and driving method thereof
US7046220B2 (en) * 2001-11-09 2006-05-16 Sharp Kabushiki Kaisha Display and driving method thereof
EP1445757A4 (en) * 2001-11-16 2006-10-11 Nippon Seiki Co Ltd Organic el panel drive circuit
EP1445757A1 (en) * 2001-11-16 2004-08-11 Nippon Seiki Co., Ltd. Organic el panel drive circuit
US20030103019A1 (en) * 2001-12-01 2003-06-05 Lg Electronics Inc. Cooling apparatus of plasma display panel and method for stabilizing plasma display panel
US7817107B2 (en) 2001-12-01 2010-10-19 Lg Electronics Inc. Cooling apparatus of plasma display panel and method for stabilizing plasma display panel
US7598938B2 (en) * 2001-12-01 2009-10-06 Lg Electronics Inc. Cooling apparatus of plasma display panel and method for stabilizing plasma display panel
US20090122050A1 (en) * 2001-12-01 2009-05-14 Lg Electronics Inc. Cooling apparatus of plasma display panel and method for stabilizing plasma display panel
EP1329873A2 (en) * 2002-01-18 2003-07-23 Tohoku Pioneer Corp. Drive method of light-emitting display panel and organic EL display device
EP1329873A3 (en) * 2002-01-18 2008-05-14 Tohoku Pioneer Corp. Drive method of light-emitting display panel and organic EL display device
US20030137475A1 (en) * 2002-01-18 2003-07-24 Tohoku Pioneer Corporation Drive method of light-emitting display panel and organic EL display device
US7236148B2 (en) * 2002-01-18 2007-06-26 Tohoku Pioneer Corporation Drive method of light-emitting display panel and organic EL display device
CN100385477C (en) 2002-01-18 2008-04-30 东北先锋电子股份有限公司 Drive method of light emitting display screen and organic EL display unit
US8004513B2 (en) 2002-03-06 2011-08-23 Semiconductor Energy Laboratory Co., Ltd. Semiconductor integrated circuit and method of driving the same
US8373694B2 (en) 2002-03-06 2013-02-12 Semiconductor Energy Laboratory Co., Ltd. Semiconductor integrated circuit and method of driving the same
US20040008072A1 (en) * 2002-03-06 2004-01-15 Hajime Kimura Semiconductor integrated circuit and method of driving the same
US20100328288A1 (en) * 2002-03-06 2010-12-30 Semiconductor Energy Laboratory Co., Ltd. Semiconductor integrated circuit and method of driving the same
US7728653B2 (en) 2002-03-06 2010-06-01 Semiconductor Energy Laboratory Co., Ltd. Display and method of driving the same
US20050140610A1 (en) * 2002-03-14 2005-06-30 Smith Euan C. Display driver circuits
US7535441B2 (en) * 2002-03-14 2009-05-19 Cambridge Display Technology Limited Display driver circuits
US20050180083A1 (en) * 2002-04-26 2005-08-18 Toshiba Matsushita Display Technology Co., Ltd. Drive circuit for el display panel
US7800558B2 (en) 2002-06-18 2010-09-21 Cambridge Display Technology Limited Display driver circuits for electroluminescent displays, using constant current generators
WO2003107318A1 (en) 2002-06-18 2003-12-24 Cambridge Display Technology Limited Display driver circuits for electroluminescent displays, using constant current generators
WO2003107313A3 (en) * 2002-06-18 2004-03-04 Cambridge Display Tech Ltd Data driver circuit for oled display
WO2003107313A2 (en) * 2002-06-18 2003-12-24 Cambridge Display Technology Limited Display driver circuits
US20060038758A1 (en) * 2002-06-18 2006-02-23 Routley Paul R Display driver circuits
GB2389952A (en) * 2002-06-18 2003-12-24 Cambridge Display Tech Ltd Driver circuits for electroluminescent displays with reduced power consumption
US7834824B2 (en) 2002-06-18 2010-11-16 Cambridge Display Technology Limited Display driver circuits
US20060001613A1 (en) * 2002-06-18 2006-01-05 Routley Paul R Display driver circuits for electroluminescent displays, using constant current generators
CN100423066C (en) * 2002-06-18 2008-10-01 剑桥显示技术公司 Display driver circuits for electroluminescent displays, using constant current generators
GB2389951A (en) * 2002-06-18 2003-12-24 Cambridge Display Tech Ltd Display driver circuits for active matrix OLED displays
US7245277B2 (en) 2002-07-10 2007-07-17 Pioneer Corporation Display panel and display device
EP1381019A1 (en) * 2002-07-10 2004-01-14 Pioneer Corporation Automatic luminance adjustment device and method
US20040051684A1 (en) * 2002-07-10 2004-03-18 Pioneer Corporation Display panel and display device
US20050035933A1 (en) * 2002-07-19 2005-02-17 Stmicroelectronics S.A. Automated adaptation of the supply voltage of a light-emitting display according to the desired luminance
US20040017725A1 (en) * 2002-07-19 2004-01-29 Celine Mas Automated adaptation of the supply voltage of a light-emitting display according to the desired luminance
US20040051725A1 (en) * 2002-07-19 2004-03-18 Celine Mas Display of an image on an array screen by selective addressing of screen lines
US7755580B2 (en) 2002-07-19 2010-07-13 Stmicroelectronics S.A. Automated adaptation of the supply voltage of a light-emitting display according to the desired luminance
US7463252B2 (en) 2002-07-19 2008-12-09 Stmicroelectronics S.A. Image display on an array screen
EP1383103A1 (en) 2002-07-19 2004-01-21 St Microelectronics S.A. Automatic adaptation of the supply voltage of an electroluminescent panel depending on the desired luminance
US20040021654A1 (en) * 2002-07-19 2004-02-05 Celine Mas Image display on an array screen
US7173640B2 (en) 2002-07-19 2007-02-06 Stmicroelectronics S.A. Display of an image on an array screen by selective addressing of screen lines
US7589701B2 (en) * 2002-08-21 2009-09-15 Koninklijke Philips Electronics N.V. Systems and methods for driving a display device and interrupting a feedback
WO2004019311A2 (en) 2002-08-21 2004-03-04 Koninklijke Philips Electronics N.V. Display device
US20060071882A1 (en) * 2002-08-21 2006-04-06 Koninklijke Philips Electronics, N.V. Display device
WO2004019311A3 (en) * 2002-08-21 2004-06-17 Koninkl Philips Electronics Nv Display device
US20090122049A1 (en) * 2002-10-31 2009-05-14 Semiconductor Energy Laboratory Co., Ltd. Display Device and Controlling Method Thereof
US8253660B2 (en) 2002-10-31 2012-08-28 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US9147698B2 (en) 2002-10-31 2015-09-29 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US7999769B2 (en) 2002-10-31 2011-08-16 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US8773333B2 (en) 2002-10-31 2014-07-08 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
EP1556847A4 (en) * 2002-10-31 2009-10-21 Semiconductor Energy Lab Display device and controlling method thereof
US20100020060A1 (en) * 2002-10-31 2010-01-28 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US7773082B2 (en) 2002-10-31 2010-08-10 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
EP1556847A1 (en) * 2002-10-31 2005-07-27 Semiconductor Energy Laboratory Co., Ltd. Display device and controlling method thereof
US9626913B2 (en) 2003-01-17 2017-04-18 Semiconductor Energy Laboratory Co., Ltd. Current source circuit, a signal line driver circuit and a driving method thereof and a light emitting device
US8659529B2 (en) * 2003-01-17 2014-02-25 Semiconductor Energy Laboratory Co., Ltd. Current source circuit, a signal line driver circuit and a driving method thereof and a light emitting device
US20040232952A1 (en) * 2003-01-17 2004-11-25 Hajime Kimura Current source circuit, a signal line driver circuit and a driving method thereof and a light emitting device
US20050062685A1 (en) * 2003-06-09 2005-03-24 Masashi Nogawa Drive circuit and display system with said drive circuit
US7483003B2 (en) * 2003-06-09 2009-01-27 Texas Instruments Incorporated Drive circuit and display system with said drive circuit
US20070069998A1 (en) * 2003-06-18 2007-03-29 Naugler W Edward Jr Method and apparatus for controlling pixel emission
US20040257352A1 (en) * 2003-06-18 2004-12-23 Nuelight Corporation Method and apparatus for controlling
US20050017922A1 (en) * 2003-07-22 2005-01-27 Barco, Naamloze Vennottschap Method for controlling an organic light-emitting diode display, and display applying this method
EP1505565A1 (en) * 2003-08-07 2005-02-09 Barco N.V. Method and system for controlling an OLED display element for improved lifetime and light output
US7262753B2 (en) 2003-08-07 2007-08-28 Barco N.V. Method and system for measuring and controlling an OLED display element for improved lifetime and light output
US6995519B2 (en) 2003-11-25 2006-02-07 Eastman Kodak Company OLED display with aging compensation
WO2005055186A1 (en) * 2003-11-25 2005-06-16 Eastman Kodak Company An oled display with aging compensation
US20050200293A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Penlight and touch screen data input system and method for flat panel displays
US20050200296A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Method and device for flat panel emissive display using shielded or partially shielded sensors to detect user screen inputs
US20050200292A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Emissive display device having sensing for luminance stabilization and user light or touch screen input
US7166966B2 (en) 2004-02-24 2007-01-23 Nuelight Corporation Penlight and touch screen data input system and method for flat panel displays
US20050200294A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Sidelight illuminated flat panel display and touch panel input device
US20100207935A1 (en) * 2004-03-18 2010-08-19 Samsung Electronics Co., Ltd. Display device and driving apparatus thereof
US7710382B2 (en) * 2004-03-18 2010-05-04 Samsung Electronics Co., Ltd. Display device and driving apparatus thereof
US20050206605A1 (en) * 2004-03-18 2005-09-22 Jheen-Hyeok Park Display device and driving apparatus thereof
US8659531B2 (en) 2004-03-18 2014-02-25 Samsung Display Co., Ltd. Display device and driving apparatus thereof
US20050243023A1 (en) * 2004-04-06 2005-11-03 Damoder Reddy Color filter integrated with sensor array for flat panel display
US7619598B2 (en) 2004-04-08 2009-11-17 Stmicroelectronics S.R.L. Driver for an OLED passive-matrix display
US20070171155A1 (en) * 2004-04-08 2007-07-26 Stmicroelectronics S.R.L. Driver for an oled passive-matrix display
WO2005098806A1 (en) * 2004-04-08 2005-10-20 Stmicroelectronics S.R.L. Driver for an oled passive-matrix display
US20050225519A1 (en) * 2004-04-12 2005-10-13 The Board Of Trustees Of The Leland Stanford Junior University Low power circuits for active matrix emissive displays and methods of operating the same
US7129938B2 (en) 2004-04-12 2006-10-31 Nuelight Corporation Low power circuits for active matrix emissive displays and methods of operating the same
US20050231535A1 (en) * 2004-04-16 2005-10-20 Sanyo Electric Co., Ltd. Display device
CN100458879C (en) 2004-04-16 2009-02-04 三洋电机株式会社 Display device
EP1587056A1 (en) * 2004-04-16 2005-10-19 Sanyo Electric Co., Ltd. Current driven emissive display device
US20050248515A1 (en) * 2004-04-28 2005-11-10 Naugler W E Jr Stabilized active matrix emissive display
US20060038804A1 (en) * 2004-05-21 2006-02-23 Masahiko Hayakawa Display device and electronic device
US7482629B2 (en) 2004-05-21 2009-01-27 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device
US20090174333A1 (en) * 2004-05-21 2009-07-09 Semiconductor Energy Laboratory Co., Ltd. Display Device and Electronic Device
US7834355B2 (en) 2004-05-21 2010-11-16 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device
US7245297B2 (en) 2004-05-22 2007-07-17 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device
US8111215B2 (en) 2004-05-22 2012-02-07 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device
US20050285823A1 (en) * 2004-05-22 2005-12-29 Hajime Kimura Display device and electronic device
US20060007248A1 (en) * 2004-06-29 2006-01-12 Damoder Reddy Feedback control system and method for operating a high-performance stabilized active-matrix emissive display
US8274456B2 (en) 2004-06-29 2012-09-25 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method of the same, and electronic apparatus
US8013809B2 (en) 2004-06-29 2011-09-06 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method of the same, and electronic apparatus
US20060139254A1 (en) * 2004-06-29 2006-06-29 Masahiko Hayakawa Display device and driving method of the same, and electronic apparatus
US20070182675A1 (en) * 2004-07-23 2007-08-09 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US8134546B2 (en) 2004-07-23 2012-03-13 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US8482493B2 (en) 2004-07-23 2013-07-09 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US8354794B2 (en) 2004-08-13 2013-01-15 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
US20090224676A1 (en) * 2004-08-13 2009-09-10 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
US7923937B2 (en) 2004-08-13 2011-04-12 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
US20110181189A1 (en) * 2004-08-13 2011-07-28 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and driving method thereof
US8576147B2 (en) 2004-08-23 2013-11-05 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device
US8194006B2 (en) 2004-08-23 2012-06-05 Semiconductor Energy Laboratory Co., Ltd. Display device, driving method of the same, and electronic device comprising monitoring elements
US20060055631A1 (en) * 2004-08-31 2006-03-16 Tohoku Pioneer Corporation Drive device of light emitting display panel
US7479955B2 (en) * 2004-08-31 2009-01-20 Tohoku Pioneer Corporation Drive device of light emitting display panel
US20080143657A1 (en) * 2004-10-12 2008-06-19 Genoa Color Technologies Ltd. Method, Device and System of Response Time Compensation
US8188958B2 (en) * 2004-10-12 2012-05-29 Samsung Electronics Co., Ltd. Method, device and system of response time compensation
US7442950B2 (en) 2004-12-06 2008-10-28 Semiconductor Energy Laboratory Co., Ltd. Light emitting device
US7812794B2 (en) 2004-12-06 2010-10-12 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US20090051630A1 (en) * 2004-12-06 2009-02-26 Semiconductor Energy Laboratory Co., Ltd. Light Emitting Device
US20060118699A1 (en) * 2004-12-06 2006-06-08 Semiconductor Energy Laboratory Co., Ltd. Light emitting device
US7978158B2 (en) 2004-12-06 2011-07-12 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US20060158393A1 (en) * 2004-12-06 2006-07-20 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
US20110012939A1 (en) * 2004-12-06 2011-01-20 Semiconductor Energy Laboratory Co., Ltd.. Display Device and Driving Method Thereof
US7902533B2 (en) 2004-12-06 2011-03-08 Semiconductor Energy Laboratory Co., Ltd. Light emitting device
US8044949B2 (en) 2005-05-02 2011-10-25 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus for displaying images
US20060244699A1 (en) * 2005-05-02 2006-11-02 Semiconductor Energy Laboratory Co., Ltd. Light emitting device and electronic apparatus
CN100550101C (en) 2005-07-07 2009-10-14 东北先锋公司 Drive apparatus and drive method for light-emitting display panel
CN101263543B (en) 2005-09-12 2011-03-02 剑桥显示技术有限公司 Active matrix display drive control systems
US7973670B2 (en) 2005-12-28 2011-07-05 Semiconductor Energy Laboratory Co., Ltd. Display device and method for inspecting the same
US20070159742A1 (en) * 2005-12-28 2007-07-12 Semiconductor Energy Laboratory Co., Ltd. Display device and method for inspecting the same
US20090317172A1 (en) * 2006-04-12 2009-12-24 SOCIéTé BIC Writing Tip For Tracing Lines of Different Widths and Writing Implement Comprising Such a Tip
CN101816033B (en) 2007-10-05 2012-09-05 剑桥显示技术有限公司 Method of driving an electro-optic display
US20100245401A1 (en) * 2007-10-05 2010-09-30 Cambridge Display Technology Limited Method of Driving an Electro-Optic Display
US20100259528A1 (en) * 2007-10-05 2010-10-14 Cambridge Display Technology Limited Dynamic Adaptation of the Power Supply Voltage for Current-Driven EL Displays
WO2009044122A1 (en) * 2007-10-05 2009-04-09 Cambridge Display Technology Limited Method of driving an electro-optic display
US8941694B2 (en) 2007-10-05 2015-01-27 Cambridge Display Technology Limited Method of driving an electro-optic display utilizing internal capacitance to smooth a digitally modulated signal
GB2453373A (en) * 2007-10-05 2009-04-08 Cambridge Display Tech Ltd Voltage controlled display driver for an electroluminescent display
US20110070670A1 (en) * 2008-05-23 2011-03-24 Lee Jeong-Yeop Process condition evaluation method for liquid crystal display module
US20090289655A1 (en) * 2008-05-23 2009-11-26 Lee Jeong-Yeop Process condition evaluation method for liquid crystal display module
US8178367B2 (en) 2008-05-23 2012-05-15 Lg Display Co., Ltd. Process condition evaluation method for liquid crystal display module
US7858405B2 (en) * 2008-05-23 2010-12-28 Lg Display Co., Ltd. Process condition evaluation method for liquid crystal display module
US8897488B2 (en) 2010-01-13 2014-11-25 National Kaohsiung First University Of Science And Technology Body gesture control system for operating electrical and electronic devices
US20110170745A1 (en) * 2010-01-13 2011-07-14 Chao-Lieh Chen Body Gesture Control System for Operating Electrical and Electronic Devices
US20120139955A1 (en) * 2010-12-02 2012-06-07 Ignis Innovation Inc. System and methods for thermal compensation in amoled displays
US10460669B2 (en) 2010-12-02 2019-10-29 Ignis Innovation Inc. System and methods for thermal compensation in AMOLED displays
US8907991B2 (en) * 2010-12-02 2014-12-09 Ignis Innovation Inc. System and methods for thermal compensation in AMOLED displays
US10211364B2 (en) 2014-10-31 2019-02-19 eLux, Inc. Display with surface mount emissive elements and active matrix drive
US10170664B2 (en) 2014-10-31 2019-01-01 eLux, Inc. Surface mount emissive elements
US10242977B2 (en) 2014-10-31 2019-03-26 eLux, Inc. Fluid-suspended microcomponent harvest, distribution, and reclamation
US9825202B2 (en) 2014-10-31 2017-11-21 eLux, Inc. Display with surface mount emissive elements
US10319878B2 (en) 2014-10-31 2019-06-11 eLux, Inc. Stratified quantum dot phosphor structure
US10381335B2 (en) 2014-10-31 2019-08-13 ehux, Inc. Hybrid display using inorganic micro light emitting diodes (uLEDs) and organic LEDs (OLEDs)
US10381332B2 (en) 2014-10-31 2019-08-13 eLux Inc. Fabrication method for emissive display with light management system
US10418527B2 (en) 2014-10-31 2019-09-17 eLux, Inc. System and method for the fluidic assembly of emissive displays
US10446728B2 (en) 2014-10-31 2019-10-15 eLux, Inc. Pick-and remove system and method for emissive display repair
US10236279B2 (en) 2014-10-31 2019-03-19 eLux, Inc. Emissive display with light management system

Similar Documents

Publication Publication Date Title
US8026876B2 (en) OLED luminance degradation compensation
CN100464216C (en) Method of driving liquid crystal display and liquid crystal display using the driving method
US5844540A (en) Liquid crystal display with back-light control function
CN100452155C (en) Display device and the driving method of the same
CN100423045C (en) LED Image display, driving circuit device and fault detecting method
KR100251624B1 (en) Display device, controller of display device and control method of display device
US5493183A (en) Open loop brightness control for EL lamp
US4626765A (en) Apparatus for indicating remaining battery capacity
US6677923B2 (en) Liquid crystal driver and liquid crystal display incorporating the same
US7656370B2 (en) Method and circuit arrangement for the ageing compensation of an organic light-emitting diode and circuit arrangement
US20010052606A1 (en) Display device
US20030001804A1 (en) Drive method and drive apparatus for a display panel
EP0782373A1 (en) Method and apparatus for driving capacitive light emitting device
KR100884679B1 (en) LED drive circuit
US6060840A (en) Method and control circuit for controlling an emission current in a field emission display
US5754156A (en) LCD driver IC with pixel inversion operation
EP1077444A2 (en) System and method for on-chip calibration of illumination sources for an integrated circuit display
JP2009506522A (en) Light emitting diode (LED) driving apparatus and method
US4045691A (en) Level shift circuit
US7061452B2 (en) Spontaneous light-emitting display device
EP0888004A2 (en) Brightness controlling apparatus
JP2006325396A (en) Dc-dc converter having overcurrent/overvoltage protection function and led drive circuit including same
US20030038770A1 (en) Liquid crystal display and method for driving the same
US7388569B2 (en) Reflection liquid crystal display apparatus
US6069448A (en) LCD backlight converter having a temperature compensating means for regulating brightness

Legal Events

Date Code Title Description
AS Assignment

Owner name: PIONEER ELECTRONIC CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAKAMOTO, MITSUNAO;REEL/FRAME:007076/0667

Effective date: 19940526

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12